pto speed

[Mark Basinger]

I have a ford 600 and a john deere 990. At the same throttle speed, the ford 600 seems to have much more pto speed. Is this true? Why is this?

Is there a way to increase the pto speed on the 990?

Thanks in advance. You always seem to help me out, even with the stupid questions...

 

[patsublett]

They both should be 540rpm at a little below full throttle.

 

[mowr]

540 rpm is the recommended PTO speed for both tractors. The engine speed required to achieve 540 PTO rpm varies widely depending on make, model, transmission, etc. The tachometer on each of your tractors should tell you what engine speed is necessary for that tractor to run the PTO at 540 rpm.

 

[JDseller]

Those Ford"s where at 540 pto speed around 1750 engine rpm. The engine would go to 2300-2400 rpm. So if you figure it out
1750/540 = 2400/740.
The JD 990 does not get to 540 pto speed until around 2300 engine rpm.
That is one reason I don"t like using those small compact tractors. If you need 540 pto speed you have to run them wide open even if you don"t need the horse power.
There is no way to change the pto speed on the JD 990. The engine would not have any torque don"t at the lower engine speed any way.

Like an old equipment dealer always was saying: There are horses and there are ponies. These compacts are ponies.

 

[Mark Basinger]

Thanks Guys. I think I understand it better. JD, your answer makes sense to me based on my observations. It seems I have to run the 990 at full throttle to get the same pto speed as the ford at much lower throttle.